import java.util.Scanner;

public class NGuessNumber {
    public static int[] num=new int[4];
    public static int[] gueslist=new int[4];
    public static int a_nums =0;
    public static int b_nums =0;
        public static int[] generateAnswer(){

            int index = 0;


            while (true) {
                int random = (int)(Math.random() * 9 + 1);
                int j = 0;
                for ( ; j < num.length; j++) {
                    if(random == num[j]) {
                        break;
                    }
                }
                if(j == num.length ) {
                    num[index++] = random;
                }
                if (index == 4) {
                    break;
                }

            }
            return num;
        }
    public static int[] getPlayerInput(){

        try {
            Scanner scan = new Scanner(System.in);

            for (int i = 0; i < 4; i++) {
                System.out.println("请输入0-9之间的第" + (i+1) + "个数字：");

                int pl = scan.nextInt();
                if (pl >= 10 || pl < 0) {
                    System.out.print("输入错误，");
                    i=i-1;
                }else {
                    gueslist[i] = pl;
                }
            }
        }catch (Exception e){
            System.out.println("输入错误");
        }
        return gueslist;
    }
    public static String compareGuessAnswer(){
        a_nums=0;
        b_nums=0;

        for (int i=0;i<num.length;i++){
            for (int j=0;j<num.length;j++){
                if (i!=j){
                    if (num[i]==gueslist[j]){
                        b_nums++;
                    }
                }else {
                    if(num[i]==gueslist[j]){
                        a_nums++;
                    }
                }
            }
        }
        System.out.println(a_nums+"A"+b_nums+"B");
        System.out.println("A表示存在且位置正确的数字个数，B表示存在且位置不正确的数字个数！");
        System.out.println("如：1A2B,表示你猜测的四个数字有3个是对的，有一个位置对，两个位置不对。\n");

        return a_nums+"A"+b_nums+"B\n"+"A表示存在且位置正确的数字个数，B表示存在且位置不正确的数字个数！\n"+"如：1A2B,表示你猜测的四个数字有3个是对的，有一个位置对，两个位置不对。";
    }
    public static boolean isWin(){
        boolean fl = false;
        if(a_nums==4){
            fl=true;
        }else {
            fl=false;
        }
        return fl;
    }
    public static void main(String[] args) {
        Scanner scanner=new Scanner(System.in);
        while (true) {
            generateAnswer();
            while (true) {
                getPlayerInput();
                compareGuessAnswer();
                if (isWin()) {
                    System.out.println("玩家胜利");
                    break;
                } else {
                    System.out.println("猜错了，再试一次");
                }
            }
            System.out.println("在玩一次(y/n)");
            String choice = scanner.next();
            if (!choice.equalsIgnoreCase("y")) {
                break;
            }
        }
    }
}
